Community Water System · PWSID LA1021007

Holum Water System

Serves 1,230 peopleGroundwaterOwner: PrivateGrayson, Louisiana
2 open treatment violations.

Open for: Groundwater Rule. EPA counts treatment-technique violations as health-based: a required protective step was not done. It is not a measurement of contamination.

On record since 2005: 51 violations. 31 over the limit · 4 treatment lapses · 14 missed or late tests · 2 notices or reports. Most recent began 2025-04-01.

For this year's test results, ask the utility for its annual Consumer Confidence Report. Every community system must publish one.

31Over the limit
4Treatment lapse2 open
14Missed or late test
2Notice or report

More violations on record than 93% of active water systems in Louisiana. Small systems with no staff chemist often rack up missed-test violations; big utilities rarely do.

The record, year by year

2005 · Missed or late test: 1200520102012 · Treatment lapse: 12013 · Missed or late test: 12014 · Over the limit: 12014 · Missed or late test: 22014 · Missed or late test: 22015 · Missed or late test: 52015 · Missed or late test: 52015 · Missed or late test: 52015 · Missed or late test: 52015 · Missed or late test: 52015 · Notice or report: 120152016 · Over the limit: 22016 · Over the limit: 22016 · Missed or late test: 22016 · Missed or late test: 22017 · Over the limit: 32017 · Over the limit: 32017 · Over the limit: 32017 · Missed or late test: 32017 · Missed or late test: 32017 · Missed or late test: 32018 · Over the limit: 42018 · Over the limit: 42018 · Over the limit: 42018 · Over the limit: 42018 · Notice or report: 12019 · Over the limit: 52019 · Over the limit: 52019 · Over the limit: 52019 · Over the limit: 52019 · Over the limit: 52020 · Over the limit: 42020 · Over the limit: 42020 · Over the limit: 42020 · Over the limit: 420202021 · Over the limit: 42021 · Over the limit: 42021 · Over the limit: 42021 · Over the limit: 42021 · Treatment lapse: 22021 · Treatment lapse: 22022 · Over the limit: 12022 · Treatment lapse: 12023 · Over the limit: 12024 · Over the limit: 42024 · Over the limit: 42024 · Over the limit: 42024 · Over the limit: 42025 · Over the limit: 22025 · Over the limit: 22025
One square = one violation, by the year it began. Empty columns are years with nothing on EPA's record.
61% over the limit · 318% treatment lapse · 427% missed or late test · 144% notice or report · 2

Across Louisiana, 31% of violations are missed or late tests and 25% are water over a limit.

How far over the limit

at the limit2×5×10×100×+Trihalomethanes (TTHM)Total Haloacetic Acids (HAA5)2025-04-01 · Trihalomethanes (TTHM): measured 0.0850 MG/L vs limit 0.0800 MG/L (1.1×)2025-01-01 · Trihalomethanes (TTHM): measured 0.1000 MG/L vs limit 0.0800 MG/L (1.2×)2024-10-01 · Trihalomethanes (TTHM): measured 0.1030 MG/L vs limit 0.0800 MG/L (1.3×)2024-07-01 · Trihalomethanes (TTHM): measured 0.1070 MG/L vs limit 0.0800 MG/L (1.3×)2024-04-01 · Trihalomethanes (TTHM): measured 0.0970 MG/L vs limit 0.0800 MG/L (1.2×)2024-01-01 · Trihalomethanes (TTHM): measured 0.0900 MG/L vs limit 0.0800 MG/L (1.1×)2023-10-01 · Trihalomethanes (TTHM): measured 0.0870 MG/L vs limit 0.0800 MG/L (1.1×)2022-01-01 · Trihalomethanes (TTHM): measured 0.0900 MG/L vs limit 0.0800 MG/L (1.1×)2021-10-01 · Trihalomethanes (TTHM): measured 0.0960 MG/L vs limit 0.0800 MG/L (1.2×)2021-07-01 · Trihalomethanes (TTHM): measured 0.1000 MG/L vs limit 0.0800 MG/L (1.2×)2021-04-01 · Trihalomethanes (TTHM): measured 0.1160 MG/L vs limit 0.0800 MG/L (1.4×)2021-01-01 · Trihalomethanes (TTHM): measured 0.1030 MG/L vs limit 0.0800 MG/L (1.3×)2020-10-01 · Trihalomethanes (TTHM): measured 0.1050 MG/L vs limit 0.0800 MG/L (1.3×)2020-07-01 · Trihalomethanes (TTHM): measured 0.1050 MG/L vs limit 0.0800 MG/L (1.3×)2020-04-01 · Trihalomethanes (TTHM): measured 0.1010 MG/L vs limit 0.0800 MG/L (1.3×)2020-01-01 · Trihalomethanes (TTHM): measured 0.1030 MG/L vs limit 0.0800 MG/L (1.3×)2019-10-01 · Trihalomethanes (TTHM): measured 0.0980 MG/L vs limit 0.0800 MG/L (1.2×)2019-07-01 · Trihalomethanes (TTHM): measured 0.0940 MG/L vs limit 0.0800 MG/L (1.2×)2019-04-01 · Total Haloacetic Acids (HAA5): measured 0.0650 MG/L vs limit 0.0600 MG/L (1.1×)2019-04-01 · Trihalomethanes (TTHM): measured 0.0930 MG/L vs limit 0.0800 MG/L (1.2×)2019-01-01 · Trihalomethanes (TTHM): measured 0.0890 MG/L vs limit 0.0800 MG/L (1.1×)2018-10-01 · Trihalomethanes (TTHM): measured 0.0900 MG/L vs limit 0.0800 MG/L (1.1×)2018-07-01 · Trihalomethanes (TTHM): measured 88.00 UG/L vs limit 80.00 UG/L (1.1×)2018-04-01 · Trihalomethanes (TTHM): measured 88.00 UG/L vs limit 80.00 UG/L (1.1×)2018-01-01 · Trihalomethanes (TTHM): measured 101.00 UG/L vs limit 80.00 UG/L (1.3×)2017-10-01 · Trihalomethanes (TTHM): measured 108.00 UG/L vs limit 80.00 UG/L (1.4×)2017-07-01 · Trihalomethanes (TTHM): measured 100.00 UG/L vs limit 80.00 UG/L (1.2×)2017-04-01 · Trihalomethanes (TTHM): measured 88.00 UG/L vs limit 80.00 UG/L (1.1×)2016-10-01 · Trihalomethanes (TTHM): measured 113.00 UG/L vs limit 80.00 UG/L (1.4×)2016-07-01 · Trihalomethanes (TTHM): measured 106.00 UG/L vs limit 80.00 UG/L (1.3×)
Each dot is one over-the-limit violation: the measured value divided by the limit it broke, on a log scale. Most legal limits for chemicals are running averages set for a lifetime of drinking, so “just over” and “ten times over” are very different news. Hover a dot for the numbers.

Lead & copper at the tap

Utilities sample taps in homes most likely to have lead pipes, and report the 90th-percentile result: 9 in 10 homes sampled came in at or below this number. Above the red line (the action level) the utility must act. The action level is not a safe level; EPA's health goal for lead is zero. EPA's file does not date these results, so they are shown highest first.

Lead, 90th percentile 3 results on file · action level 15 ppb

3 ppb
1 ppb
1 ppb

Open now (2)

  1. 2021-11-03Groundwater Rule ×2Failure To Address DeficiencyOpen

Every violation on record

  1. 2025-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0850 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  2. 2025-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1000 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  3. 2024-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1030 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  4. 2024-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1070 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  5. 2024-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0970 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  6. 2024-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0900 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  7. 2023-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0870 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  8. 2022-09-15Revised Total Coliform RuleTTBack in compliance
  9. 2022-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0900 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  10. 2021-11-03Groundwater Rule ×2Failure To Address DeficiencyOpen
  11. 2021-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0960 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  12. 2021-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1000 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  13. 2021-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1160 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  14. 2021-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1030 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  15. 2020-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1050 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  16. 2020-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1050 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  17. 2020-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1010 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  18. 2020-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1030 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  19. 2019-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0980 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  20. 2019-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0940 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  21. 2019-04-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 0.0650 MG/L · limit 0.0600 MG/LPeriod ended · no return to compliance on file
  22. 2019-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0930 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  23. 2019-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0890 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  24. 2018-12-30Public NoticePN Violation for NPDWR ViolationBack in compliance
  25. 2018-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0900 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
Show the other 25 entries
  1. 2018-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 88.00 UG/L · limit 80.00 UG/LPeriod ended · no return to compliance on file
  2. 2018-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 88.00 UG/L · limit 80.00 UG/LPeriod ended · no return to compliance on file
  3. 2018-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 101.00 UG/L · limit 80.00 UG/LPeriod ended · no return to compliance on file
  4. 2017-10-31Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  5. 2017-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 108.00 UG/L · limit 80.00 UG/LPeriod ended · no return to compliance on file
  6. 2017-07-31Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  7. 2017-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 100.00 UG/L · limit 80.00 UG/LPeriod ended · no return to compliance on file
  8. 2017-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 88.00 UG/L · limit 80.00 UG/LPeriod ended · no return to compliance on file
  9. 2017-01-31Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  10. 2016-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 113.00 UG/L · limit 80.00 UG/LPeriod ended · no return to compliance on file
  11. 2016-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 106.00 UG/L · limit 80.00 UG/LPeriod ended · no return to compliance on file
  12. 2016-02-29Total Haloacetic Acids (HAA5)Monitoring and Reporting (DBP)Back in compliance
  13. 2016-02-29Trihalomethanes (TTHM)Monitoring and Reporting (DBP)Back in compliance
  14. 2015-08-01Coliform (TCR)Monitoring, Routine Minor (TCR)Back in compliance
  15. 2015-07-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  16. 2015-07-01Coliform (TCR)Monitoring, Routine Minor (TCR)Back in compliance
  17. 2015-06-09Public NoticePN Violation for NPDWR ViolationBack in compliance
  18. 2015-02-01Coliform (TCR)Monitoring, Routine Major (TCR)Back in compliance
  19. 2015-01-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  20. 2014-10-01Coliform (TCR)MCL, Monthly (TCR)Back in compliance
  21. 2014-09-01Total Haloacetic Acids (HAA5)Monitoring and Reporting (DBP)Back in compliance
  22. 2014-09-01Trihalomethanes (TTHM)Monitoring and Reporting (DBP)Back in compliance
  23. 2013-01-01Coliform (TCR)Monitoring, Routine Minor (TCR)Back in compliance
  24. 2012-01-03Groundwater RuleFailure To Address DeficiencyBack in compliance
  25. 2005-01-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance

System details

Population served1,230
Service connections410
Water sourceGroundwater
System typeCommunity Water System
OwnerPrivate
StatusActive
CityGrayson
EPA ZIP on file71435

Areas served

  • Caldwell Parish

Reading this record

Holum Water System is a community water system that draws from groundwater and serves about 1,230 people in Grayson, Louisiana. Everything above comes from the EPA's Safe Drinking Water Information System (SDWIS), where states report every violation by every public water system.

Four kinds of violation. Only one is a measurement of the water: over the limit means a test came back above a legal maximum (an MCL). A treatment lapse means a required protective step was not done, such as disinfection, filtration, fixing a defect an inspector found, or filing a lead-pipe inventory. A missed or late test means a required test was skipped or never reported. That is the most common kind, and the most misread: it does not mean the water was bad, and it does not mean the water was fine. Notices and reports covers public notices and the annual Consumer Confidence Report.

Status. “Back in compliance” means the state recorded a return to compliance. “Period ended” means the violation's compliance period is over but no return to compliance was ever filed, which is common in older records. EPA's federal copy lags state records by months, so call the utility for anything current.